Header pipe



FIG. 1 is a front elevation view of a header pipe;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a cross section view taken along the line VII-VII of FIG. 5;

FIG. 8 is a perspective view thereof;

FIG. 9 is an enlarged right side view thereof; and,

FIG. 10 is an enlarged left side view thereof. 

CLAIM The ornamental design for a header pipe, as shown and described. 